ci: Bump typing_extensions python to 3.14

[dangotbanned]

Related

• feat: Adds ThemeConfig (TypedDict) #3536 (comment)
• 5.4.1 patch release this week? #3548 (comment)
• Preparing for Python 3.13 #3587
  • This PR contains one of the changes already planned there
  • However that PR is blocked until Release version 0.10.0 geopandas/pyogrio#470

Description

Updates python_version<"3.13" -> python_version<"3.14".

This was already required due to multiple instances of importing typing_extensions without a version guard.
However, we are also using PEP 728 which hasn't landed in time for 3.13.

Existing usage on main

altair/altair/vegalite/v5/api.py

Lines 639 to 666 in 32990a5

	class _ConditionExtra(TypedDict, closed=True, total=False): # type: ignore[call-arg]
	# https://peps.python.org/pep-0728/
	# Likely a Field predicate
	empty: Optional[bool]
	param: Parameter | str
	test: _TestPredicateType
	value: Any
	__extra_items__: _StatementType | OneOrSeq[_LiteralValue]
	_Condition: TypeAlias = _ConditionExtra
	"""A singular, non-chainable condition produced by ``.when()``."""
	_Conditions: TypeAlias = t.List[_ConditionClosed]
	"""Chainable conditions produced by ``.when()`` and ``Then.when()``."""
	_C = TypeVar("_C", _Conditions, _Condition)
	class _Conditional(TypedDict, t.Generic[_C], total=False):
	condition: Required[_C]
	value: Any
	class _Value(TypedDict, closed=True, total=False): # type: ignore[call-arg]
	# https://peps.python.org/pep-0728/
	value: Required[Any]
	__extra_items__: Any

Updating this is now a higher priority due to scheduled release of 3.13 on 2024-10-01 (14 days away)